Wheel-tire.



. a non-skid tire which will be hereinafter.

ALBERT S. MAUR, 0F ORNGEVILLE, MARYLAND.

WHEEL-TIRE.

Specification of Letters Patent.

Patented May 8, i917.

Application filed December 3, 1914. Serial No. 875,235.

T0 all whom imag concern:

Be it known that I, ALBERT S. MAUR, a

vcitizen of the United States, residing at Orangeville, in the county ofBaltimore and State of Maryland, have invented certain new and usefulImprovements in Wheel- Tires, of which the following is a specication.

This invention relates to tires for vehicle wheels and -especially tothat class known as non-skid tires for the .wheels of automo.

biles and like vehicles.

The primary object of the invention is to rovide a tire ofthe characterspecified which, while of a very simple form and economicalconstruction, willv be reliable 'and lasting for its intended purpose.

A specific object of the invention is to .provide a tire of thecharacter specied which, at all times, will present upon slipperypavements'a series of vacuum cups or l spaces to always prevent slippingor skidding on such surfaces.

With these objects in view, the invention consists in the improvedconstruction, arrangement and combination of the parts of fullydescribed and afterward specifically claimed.

In order that the construction and operation thereof may bereadilycomprehended,

. l have illustrated in thev accompanying drawings, an approved.embodiment of my invention, and will now proceed to specificallydescribe the same Ain connectionwith said drawings, in whichf Figure 1represents a sectional view of la tire constructed in accordance with myinvention, taken on the plane indicated by the broken line 1--1, of Fig.2., and

Fig. 2 represents an outside view of a portion of my tire, looking atthe same from a point above Fig. 1, being a view of a portion of thetread of the tire.

Whenever the same parts appear in both gures, they are indicated by thesame reference characters.

Referring specitically'to the drawings, 5 indicates a rubbertire ofordinary construction except as hereinafter specified, the same beingshaped at the edges 6, 6 in any suitable or preferred form to facilitateattachment to the rim ofthe wheel, and proi.

vided with the usual thickened tread portion 7 extending around the tireand transvaried, as may be desired. rlhese ribs are preferably taperedtransversely and outwardly, being thicker at their bases than at theirouter edges, leaving circumferential, sonewhat flaring grooves betweenadjacent r1 s.

Transversely in such grooves are formed crossY bars as at 15, 16, 17 and18, such cross bars being also preferably tapered outwardly, beingthicker at their bases than at their outer edges, and they are alsopreferably of a vless radial depth than the circumferential ribs, asclearly shown.

The cross bars 15 are located between ribs 10 and 11, the cross bars 16between ribs 11 and 12, the cross bars 17 between ribs 12 and 13, andthe cross bars 18 between ribs13 and 14, and there are, consequently,

varound the tire and separated by the ribs and disposed in overlappingrelation to the series in the adjacent row 'while the cups gf eachseries are separated by the cross ars. l

Ordinarily, a popping, 4 explosive-like sound would occur as theexhausted cups would raise from the surface to which they adhere, butthe construction of the cross bars which terminate below the outer edgesof the circumferential ribs adords a vent for the cups before they areentirely raised of the surface over which they may be passing, thusobviating this diiiiculty by preventing such disagreeable popping, andthe extended ribs also protect the cross bars from the necessity ofbearing the full weight of the vehicle.

The cross bars are arranged in staggered relation to those of theadjacent series for the purpose of having, at all times, entire cupsunder the wheels, the releasing of the vacuum in the cups of adjacentseries being also so regulated that it will not be simultaneous, therebyaffording uniformity and continuity in action in both creating and rewill be ln'ought upon that part between ribs 11 and 13 but as this partgradually wears, and consequently weakens first, and as this gradualwear and weakening takes place, the parts of the tire between the ribs10 and 11 and 13 and 14, gradually take off the wear and strain, so thatthe vacuum, nonskidding effect, will be continued until the tire isentirely Worn out.

While I have described the exact construction and relation of theseveral parts, it will be obvious to those skilled in this art, thatslight changes and variations may be made therein, without departingfrom the spirit and scope of the invention.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent of the United States, is

A non-skid tire having on its tread a central circumferential main riband at each side of said main rib a plurality of circum- :terentialauxiliary ribs and having a plurality of transverse bars lying instaggered relation between the main Iand the auxiliary ribs andintegrally formed at their ends therewith, the circumferential main andauxiliary ribs and transverse bars providing circumferential rows ofcups, all the said circumferential ribs extending beyond the outer facesof the transverse bars to gradually break the sealing of the cups whenbe ing relieved from compression, the transverse bars bracing thecircumferential ribs and by their staggered relation acting when thetread is compressed to distort the circumferential ribs into sinuousform at the points under compression, said auxiliary circumferentialribs providing lateral abutments for engagement with the road-Way whenthe central rib is compressed to hold the tire from lateral skidding.

In testimony whereof I afix myl signature in presence of two Witnesses.

ALBERT S. MAUK. Witnesses:

E. WAL'roN BREWINGTON, HOWARD D. ADAMS.

